October 27, 2004
So I got two 3Com switches free from work a couple years ago. I received a Linkswitch 1000 (12 port) and Linkswitch 3000 (8 port). The only problem was that no one knew what the manager and security passwords were, so I had no way of reconfiguring them. The only password that worked was monitor/monitor, which just allows you to view the configuration. I spent some time searching for some backdoor passwords or a way to clear the password. I found some supposed backdoor user/password values, but none of them worked. I tried contacting 3Com too, but they weren't really any help unless I was willing to dish out some big bucks for support. Boo!
Two years pass. The switches collect dust unused.
The sysadmin at work found the old manuals for the switches and they had some notes in them that looked like they might be passwords. I tried various combinations to no avail. Then I searched the web again for info on how to reset passwords on these switches and turned up a promising discussion thread: http://www.tek-tips.com/viewthread.cfm?qid=555357.
The thread outlined a method to reset the switches to the factory defaults (which includes resetting the passwords). Here is the procedure, with a few notes from me.
F [firmware filename] [press enter] //ex. F ls3k3_23.slx [enter] RIP 000
//Instruction to reset to factory defaults after upgrade B [IPAddress of TFTP Server] [press enter] //ex. B 18.104.22.168 [enter]
This method has been tested on both a Linkswitch/SuperStack II 1000 and 3000. It has worked perfectly on both and reset all values to the factory default. It is presumed to work with all 3Com Superstack switches. Huzzah!